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Tap water quality report

Grafton Water District

EPA monitoring tested this supplier for 102 contaminants and detected 25. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

102
contaminants tested
25
detected
10,925
people served
12
health-based violations
Massachusetts rankingsLead in MassachusettsPFAS in Massachusetts
Water source
Ground water
Ownership
Local government
Counties served
Worcester

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

12
health-based violations
85
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-11-01 → 2012-11-30
MCL Health-based Resolved 2012-11-01 → 2012-11-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-09-01 → 2004-09-30
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-07-01 → 2004-07-31
MCL Health-based Resolved 2004-05-01 → 2004-05-31
MCL Health-based Resolved 2004-05-01 → 2004-05-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOA 0.0069 µg/L 5/8 2025
PFOS 0.0069 µg/L 5/8 2025
PFBS 0.0031 µg/L 3/8 2025
Pfhxa 0.0036 µg/L 2/8 2025
Pfpea 0.0035 µg/L 2/8 2025

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
TTHM
63.925 µg/L 80%
of the EPA limit 80 µg/L
worst single sample: 93 µg/L
106/106 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
27 µg/L 45%
of the EPA limit 60 µg/L
worst single sample: 42 µg/L
99/106 SYR4 2012–2019
Bromodichloromethane
22.055 µg/L
No EPA limit set
worst single sample: 27.4 µg/L
90/90 SYR4 2012–2019
Chloroform
30.405 µg/L
No EPA limit set
worst single sample: 34.5 µg/L
90/90 SYR4 2012–2019
Dibromochloromethane
17 µg/L
No EPA limit set
worst single sample: 22 µg/L
90/90 SYR4 2012–2019
Trichloroacetic Acid
12.45 µg/L
No EPA limit set
worst single sample: 14 µg/L
86/94 SYR4 2012–2019
Bromoform
3.2845 µg/L
No EPA limit set
worst single sample: 5.2 µg/L
84/90 SYR4 2012–2019
Dichloroacetic Acid
9.056 µg/L
No EPA limit set
worst single sample: 14.1 µg/L
77/94 SYR4 2012–2019
Nitrate
3350 µg/L 34%
of the EPA limit 10000 µg/L
worst single sample: 3700 µg/L
66/68 SYR4 2012–2019
Dibromoacetic Acid
4.42 µg/L
No EPA limit set
worst single sample: 5.1 µg/L
59/94 SYR4 2012–2019
Monochloroacetic Acid
4.89 µg/L
No EPA limit set
worst single sample: 6.1 µg/L
36/94 SYR4 2012–2019
Monobromoacetic Acid
1.31 µg/L
No EPA limit set
worst single sample: 6.2 µg/L
27/94 SYR4 2012–2019
Lead
0.0083 mg/L 55%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2025
Barium
156.45 µg/L 7.8%
of the EPA limit 2000 µg/L
worst single sample: 270 µg/L
11/11 SYR4 2012–2019
1,1,1-Trichloroethane
26 µg/L 13%
of the EPA limit 200 µg/L
worst single sample: 30 µg/L
9/84 SYR4 2012–2019
Trichloroethylene
10.84 µg/L 217%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
worst single sample: 12 µg/L
9/84 SYR4 2012–2019
cis-1,2-Dichloroethylene
19.28 µg/L 28%
of the EPA limit 70 µg/L
worst single sample: 21 µg/L
9/84 SYR4 2012–2019
1,1-Dichloroethylene
2.041 µg/L 29%
of the EPA limit 7 µg/L
worst single sample: 2.3 µg/L
8/84 SYR4 2012–2019
Tetrachloroethylene
1.0125 µg/L 20%
of the EPA limit 5 µg/L
worst single sample: 1.1 µg/L
6/84 SYR4 2012–2019
Arsenic
7.48 µg/L 75%
of the EPA limit 10 µg/L
worst single sample: 7.8 µg/L
5/15 SYR4 2012–2019
77 contaminants tested, none detected
1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneToxapheneVinyl ChlorideXylenes, TotalLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DAVID B ERICKSON
Phone
5088392302
Email
[email protected]

Frequently asked questions about Grafton Water District

Is Grafton Water District tap water safe to drink?

EPA monitoring detected 25 contaminants in Grafton Water District's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Grafton Water District's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Bromodichloromethane, Chloroform, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Grafton Water District serve?

Grafton Water District reports serving 10,925 people in Massachusetts, per its EPA record.

Has Grafton Water District had any water quality violations?

The EPA has 85 violations on file for Grafton Water District, of which 12 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.